High Power ARNS/IFF Limiter Module: Ultra Low Flat Leakage & Fast Recovery Time

Transcription

1 PRELIMINARY RFLM MC-299 High Power ARNS/IFF Limiter Module: Ultra Low Flat Leakage & Fast Recovery Time Features: SMT Limiter Module: 8mm x 5mm x 2.5mm Frequency Range: 960 MHz to 1,215 MHz High Average Power Handling: +48 dbm High Peak Power Handling: +60 dbm Low Insertion Loss: < 0.3 db Return Loss: > 17 db Flat +30 dbm Input: < 12 dbm Flat +60 dbm Input: < 21 dbm Low Spike Energy Leakage: < 0.5 ergs Ultra Fast Recovery Time: < 200 nsec DC Blocking Capacitors RoHS Compliant Description: The RFLM MC-299 SMT Silicon PIN Diode Limiter Module offers Always On High Power CW and Peak protection in the Aeronautical Radio Navigation Service (ARNS)/ Identification Friend or Foe (IFF) frequency range of 960 MHz to 1,215 MHz. This Limiter Module is based on proven hybrid assembly technique utilized extensively in high reliability, mission critical applications for several decades. The RFLM MC-299 offers excellent thermal characteristics in a compact, low profile 8mm x 5mm x 2.5mm package. It was designed for optimal small signal insertion loss permitting extremely low receiver noise figure while simultaneously offering excellent large signal protection and exceptionally low Flat Leakage for effective receiver protection in the ARNS/IFF frequency range. The RFLM MC-299 Limiter Module provides outstanding passive receiver protection (Always On) which protects against high average power up to +48 T case =+85 o C, High Peak Power up to +60 dbm (Peak) Pulse Width = 1 usec, Pulse Repetition Rate = 1%, T case =+85 o C,while maintaining low flat leakage to less than 14 dbm (typ), and reduces Spike Leakage to less than 0.5 ergs(typ). ESD and Moisture Sensitivity Rating The RFLM MC-299 Limiter Module carries a Class 1C ESD rating (HBM) and an MSL 1 moisture rating. RFuW Engineering, Ltd. sales@rfuw-engineering.com 1

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3 Thermal Management Features The proprietary design methodology minimizes the thermal resistance from the coarse stage shunt limiter diode junction to base plate. This three stage passive limiter design employs a very sensitive detector circuit which enables ultra-fast turn on of both the intermediate and coarse stages. This circuit topology coupled with the thermal characteristic of the substrate design enables the Limiter Module to reliably handling High Input RF Power up to +48 dbm CW and RF Peak Power levels up to +60 dbm (1 usec pulse 1.0% duty cycle) with base plate temperature at +85 o C. The RFLM MC-299 is based on a substrate designed to offer superior long term reliability in the customer s application by utilizing ultra-thin Au plating to combat Au embrittlement concerns. Absolute Maximum Z o =50Ω, T A = +25 o C as measured on the base ground surface of the device. Parameter Conditions Absolute Maximum Value Operating Temperature Storage Temperature Junction Temperature -65 o C to 125 o C -65 o C to 150 o C 175 o C Assembly Temperature T = 30 seconds 260 o C RF Peak Incident Power RF CW Incident Power RF Input & Output DC Block Capacitor Voltage Breakdown T CASE =85 o C, source and load VSWR < 1.2:1, RF Pulse width = 1 usec, duty cycle = 1%, derated linearly to 0 W at T CASE =150 o C (note 1) T CASE =+85 o C, source and load VSWR < 1.2:1, derated linearly to 0 W at T CASE =150 o C (note 1) +60 dbm +48 dbm 100 V DC Note 1: T CASE is defined as the temperature of the bottom ground surface of the device. RFuW Engineering, Ltd. sales@rfuw-engineering.com 3

4 RFLM MC-299 Electrical Z o=50ω, TA= +25 o C as measured on the base ground surface of the device. Parameters Symbol Test Conditions Min Value Typ Value Max Value Units Frequency F 960 MHz F 1,215 MHz 960 1,215 MHz Insertion Loss IL 960 MHz F 1,215 MHz, P in= -10dBm db Insertion Loss IL F = 1,090 MHz, P in= -10dBm db IL Rate of Change vs Operating Temperature IL 960 MHz F 1,215 MHz, Pin -10 dbm db/ o C Return Loss RL 960 MHz F 1,215 MHz, Pin= - 10dBm 17 db Return Loss RL F = 1,090 MHz, Pin= -10dBm 19 db Input 1 db Compression Point IP 1dB 960 MHz F 1,215 MHz dbm Peak Incident Power P inc (PK) RF Pulse = 1 usec, duty cycle = 1% +60 dbm CW Incident Power P inc(cw) 960 MHz F 1,215 MHz; T case = +85 o C +48 dbm Flat Leakage FL P in = +30 dbm, RF Pulse width = 1 us, duty cycle = 1% 12 dbm Flat Leakage FL P in = +60 dbm, RF Pulse width = 1 us, duty cycle = 1% 14 dbm Spike Leakage SL Pin = +60 dbm, RF Pulse Width = 1 us, duty cycle = 1% 0.5 erg Recovery Time T R Pin = +60 dbm peak, RF PW = 1 us, 50% falling edge of RF Pulse to 1 db IL, duty cycle = 1% nsec Notes: RFuW Engineering, Ltd. sales@rfuw-engineering.com 4

5 Return Loss db Insertion Loss db PRELIMINARY RFLM MC-299 Rev C RFLM MC-299 Typical Performance Z o = 50Ω, T CASE = 25 o C, PIN = -10 dbm as measured on the Ground Plane of the device. RFLM MC-299 Insertion Loss Frequency MHz RFLM MC-299 Low Signal Return Loss Frequency MHz RFuW Engineering, Ltd. sales@rfuw-engineering.com 5

6 Assembly Instructions The RFLM MC-299 may be attached to the printed circuit card using solder reflow procedures using either RoHS or Sn63/ Pb37 type solders per the Table and Temperature Profile Graph shown below: Profile Parameter Sn-Pb Assembly Technique RoHS Assembly Technique Average ramp-up rate (T L to T P ) 3 o C/sec (max) 3 o C/sec (max) Preheat Temp Min (T smin ) Temp Max (T smax ) Time ( min to max) (t s ) T smax to T L Ramp up Rate 100 o C 150 o C sec 100 o C 150 o C sec 3 o C/sec (max) Peak Temp (T P ) 225 o C +0 o C / -5 o C 260 o C +0 o C / -5 o C Time within 5 o C of Actual Peak Temp (T P ) 10 to 30 sec 20 to 40 sec Time Maintained Above: Temp (T L ) Time (t L ) 183 o C 60 to 150 sec 217 o C 60 to 150 sec Ramp Down Rate 6 o C/sec (max) 6 o C/sec (max) Time 25 o C to T P 6 minutes (max) 8 minutes (max) Solder Re-Flow Time-Temperature Profile RFuW Engineering, Ltd. sales@rfuw-engineering.com 6

7 RFLM MC-299 Limiter Module Foot Print Drawing Notes: 1) Plain surface is the RF, DC and Thermal ground. In user s end application this surface temperature must be managed to meet the power handling requirements. 2) Back side metallization is thin Au termination plating to combat Au embrittlement (Au plated over Cu). 3) Unit = mils Thermal Design Considerations: The design of the RFLM MC-299 Limiter Module permits the maximum efficiency in thermal management of the PIN Diodes while maintaining extremely high reliability. Optimum Limiter performance and reliability of the device can be achieved by the maintaining the base ground surface temperature of less than 85 o C. There must be a minimal thermal and electrical resistance between the limiter module and ground. Adequate thermal management is required to maintain a Tjc at less than +175 o C and thereby avoid adversely affecting the semiconductor reliability. Special care must be taken to assure that minimal voiding occurs in the solder connection in the areas shade in red in the figure shown below. RFuW Engineering, Ltd. sales@rfuw-engineering.com 7

8 Recommended RF Circuit Solder Footprint for the RFLM MC-299 Notes: 1) Recommended PCB material is Rogers 4350B, 20 mils thick (RF Input and Output trace width needs to be adjusted from the recommended footprint.) 2) Plain surface is RF, DC and Thermal Ground. Vias should be solid Cu filled and Au plated for optimal heat transfer from backside of Limiter Module through circuit vias to thermal ground. 3) Unit = mils Part Number Ordering Detail: The RFLM MC-299 Limiter Module is available in the following shipping formats: Part Number Description Packaging RFLM MC-299 IFF Band Limiter - Input & Output DC Blocking Caps Gel Pak RFuW Engineering, Ltd. sales@rfuw-engineering.com 8